PTSD is a real illness which many people genuinely have. However:
I've worked clinically in, studied, and researched mental health for many years. There are a number of now popular diagnoses which IMO are highly overused. PTSD and Bipolar (particularly Bipolar II) are just 2 of those. IMO they are often used as an excuse for bad behaviour - ie "It not my fault; it's the illness". Some clinicians in the industry actually say that "
the more a person bangs on about having such a diagnosis, the less likely they are to have the illness".
It's not uncommon to see people attribute their PTSD to what, for most of us, are "normal", but tragic parts of life - eg death of a loved one, a partner walking out, non-fatal car accidents etc. In fairness to OP, stuffing up his own life would be very traumatic for him.
Another feature I've observed in highly questionable diagnoses of PTSD is the presence of secondary gain - ie the benefits of the diagnosis for that person.
They can include:
- extended paid leave from work,
- becoming entitled to a disability pension,
- a medical excuse for bad behaviour (including illegal acts),
- financial payout for the anguish suffered as a result of the traumatic event,
- extra care and attention from those around you (until they get sick of it)
- an excuse to not do things that you don't want to do
- etc etc
This by no means text book, just MOO.